new starting issue

[katflap]

Originally Posted by BlackBike

Is that iacv something you could remove to inspect/clean? Also could you swap a donor battery to see if it has any effect on the stall? I know your bat is showing good.

Something else I was thinking , do some bikes come withe duel fuel injectors? This way it doesn't rely on only one in the event of a missed pulse if that is the cause of the stall. Probably impractical for rx3 application. Just thinking aloud

Yes, the IACV can be cleaned though I think it is a delicate procedure, (I have it somewhere will try and find).

My description of the IACV steps graph was slightly inaccurate. The graph shows the "step" position that the Delphi ECU has requested and not the Actual "step" position that the IACV is at. Though normally this would be the same thing.

So if the IACV is malfunctioning it could be in a completely different "step" position.

I don't suspect a malfunction as it works perfectly at any other time.

The problem could be the ECU not requesting a big enough change in IACV steps, this will be down to the ECU mapping and could be changed with a map update.

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I could try another battery though I think the low voltage as the idle drops down below idle speed it gets below the RPMs where the generator can offer any charge and the battery still trying to recover from cranking the bike at start, especially hard on batteries in cold weather.

I will try another battery when I get the chance and see if there is a difference.

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Not heard of a duel injection for the same cylinder though the Delphi ECU is capable of controlling 2 injectors for a twin.

I hope that the ECU would flag a fault if the injector missed a pulse
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Anyway, thanks BlackBike, all your comments are good food for thought

[JKR]

Thats my next step is to swap the battery. Been talking with Gerry at CSC the last couple days trouble shooting. It had been about 3000 miles since last valve check, so that was the first thing. Happy to say that the valve lash had not changed in 3000 miles. Still at .08mm where I set them. We checked for codes, none present, all connections and fuel lines look good. Its not that it wont start but it definitley has a hard time starting and staying at idle for more than a few tries. Just "feels" like a voltage thing to me and hopefully a new battery will fix. If after the swap and no change, I believe Gerry said we will be looking at replacing the O2 sensor next. Runs great, still riding. I know we'll get his figured out. Most likely if it gets over 45 degrees here it wont have the issue is what im thinkin...